What two numbers multiply to -820 and add up to -21?




Here we answer the question: "What two numbers multiply to -820 and add up to -21?"

The answer to your question is:

-41 and 20


Below we illustrate and prove that -41 and 20 multiply to -820 and add up to -21:

-41 × 20 = -820
-41 + 20 = -21

Are you asking because you are trying to figure out how to factor the following quadratic equation?

x2 - 21x - 820 = 0

If so, the solution to factor the quadratic equation above is:

(x - 41 ) (x + 20)

To summarize, since -41 and 20 multiply to -820 and add up -21, you know that the following is true:

x2 - 21x - 820 = (x - 41 ) (x + 20)


Multiply To One Number and Add Up To Another
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